'77 MG Midget 1500 - I'm back with some distributor confusion
I posted a couple weeks ago about an ornery alternator bolt that was being blocked by my distributor. Some folks here said that the best solution was to loosen and rotate my distributor, back the bolt out, and return the distributor to its original position.
That went without a hitch, I'm very grateful for the advice. However, before that I attempted to disassemble the distributor just enough to remove the vacuum advance, which turned out to be impossible.
Anyway, in putting it back together, I believe I did not replace the pictured part correctly. I'm trying to understand what this part is, and how it should be calibrated.
I've never worked with a distributor before, so I initially thought this was related to the points, but now I'm suspecting that the distributor may have been converted to an electronic ignition as this part does not show up on any diagrams I can find.
If anyone can help me understand what I'm missing here, that would be greatly appreciated.
Update: We have a spark! The timing is shot, but at least we have a spark. Thank you for your help all those who answered!
Update 2: I couldn't find much info about setting the optical sensor in the correct position, but with a little intuition I managed to eyeball the timing. Case closed!